Help With An Aggregate Query
Jan 4, 2008
Hi all. Here's my question:
I have a database table that contains rows containing defect data. The two columns I'm interested in are device and severity. Device is the name of an item that contains the defect, and severity can be one of three values. I'd like to query the table so it shows the device, and the number of instances of each of the three values for that device. For example, the result table should look like this:
device Severity 1 Severity 2 Severity 3
Widget 12 15 24
In this example, There are 51 rows containing Widget as the device. 12 have severity 1, 15 have severity 2, and 24 have severity 3.
Seems like it should be a pretty simple query, but I'm kinda new to SQL and I'm having trouble. Help would be much appreciated.
Thanks.
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Jun 17, 2007
Hi,
I have we have a client who gives their invoices in a flat file format, we import it into a SQL Server table.
Nothing is normalized – everything is repeated in every record. The fields are:
customerNumberInvoice_numberPO_numberQtyDescriptionLine_numberLine_totalFreightTaxInvoice_date
So an if an order has 10 line items, the header information (invoice number, PO number, ivoice date) are repeated on each of the lines
I am writing a query to show the following
Order number, Invoice total, Date
select invoice_no, sum(line_total + freight + tax) as invoiceTotal, customerNumber, Invoice_date from invoices group by invoice_no, Invoice, customerNumber
This works great - for each invoice I get the invoice number, InvoiceTotal, and Date
Then I was asked to add the PO Number – this is where I can’t get it right.
When I added “PO_number� to the query, I got two lines for each invoice
select invoice_no, sum(line_total + freight + tax) as invoiceTotal, customerNumber, Invoice, PO_number from invoices group by invoice_no, Invoice, Sold_To_Cust_No, PO_number
Please help - I need to end up with: invoice_no, invoiceTotal, customerNumber, Invoice_date and PO_number (sequence does not matter)
Thanks
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Dec 21, 2007
I am attempting to wrie a query that will return aggregate totals from two different tables. The problem is that the TotalForecast totals are way to high. How do I write a query to obtain the correct totals?Table 1 - dbo.QM_ResultsColumns - dbo.QM_Results.Special8, dbo.QM_Results.SessionName, dbo.QM_Results.PersonNumberTable 2 - dbo.PM_ForecastViewColumns - dbo.PM_ForecastView.Hierarchy, dbo.PM_ForecastView.ForecastSelect substring(dbo.QM_Results.Special8,0,6) AS Hierarchy, substring(dbo.QM_Results.SessionName,0,11) As CourseCode,count(dbo.QM_Results.PersonNumber) TotalAssociates,sum(dbo.PM_ForecastView.Forecast) TotalForecastFrom dbo.QM_Results INNER JOIN dbo.PM_ForecastView ON dbo.PM_ForecastView.Hierarchy = substring(dbo.QM_Results.Special8,0,6)where SessionMid in ('96882139', '23620891', '45077427', '29721437')AND substring(dbo.QM_Results.Special8,0,6) in ('EZHBA')Group By substring(dbo.QM_Results.Special8,0,6),substring(dbo.QM_Results.SessionName,0,11)Sample of data returned with my current query.Hierarchy CourseCode TotalAssociates TotalForecastEZHBA CARD167200 1179 141480EZHBA CARD167201 1416 169920EZHBA CARD167202 1119 134280EZHBA CARD167204 99 11880Results when I run aggregate query separatelyActual Total takenHierarchy CourseCode TotalTakenEZHBA CARD167200 393EZHBA CARD167201 472EZHBA CARD167202 373EZHBA CARD167204 33Forecasted Total takenHierarchy CourseCode ForecastEZHBA CARD167200 999EZHBA CARD167201 900EZHBA CARD167202 800EZHBA CARD167204 800
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Jul 11, 2005
I have two tables tb1 with item and qtyOnHand and a second table tb2 with item and qtyOrdered I am trying without success to make this happen;select sum (onHand-Ordered) from (select sum (qtyOnHand) from tb1 where item = RD35 group by item) as onHand, (select sum (qtyOrdered) from tb2 where item = RD35 group by item) as OrderedI kind of gathered it would work based on this http://weblogs.asp.net/jgalloway/archive/2004/05/19/135358.aspxI have also tried this;select tb1.item from (select sum (qtyOnHand) from tb1 where item = RD35 group by item) as onHand, (select sum (qtyOrdered) from tb2 where item = RD35 group by item) as Ordered, sum (onHand-Ordered) as available from tb1 where tb1.item = RD35Any ides, there are multiple rows of each item in each table tb1 is inventory with several different locations and tb2 is an orders table.
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Feb 13, 2014
I would like to find the first transaction_date with the criteria below and return all transactions after. i would need to use the seqn number since many of the transactions could occur on the same day.
SELECT c.MEMBER_TYPE
, c.DATE_ADDED
, h.ID
, h.ACTIVITY_TYPE
, h.TRANSACTION_DATE
, h.UF_1
, min (h.seqn)
FROM
[code]....
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Feb 29, 2008
I have two tables ItemHistory and ItemStock.
I would like to write a query which checks last years history and let us know if we have enough items in stock this year for a given span date.
First, It should get all items from @ItemHistory where WHERE DateSold >= '1/10/2007' AND DateSold < '1/11/2007'
and then checks if corresponding items are found in @ItemStock,
and then returns all the ItemID where sum(@ItemStock.Quantity) < sum(@ItemHistory.Quantity)
Thank You.
Here is the DDL and DML
DECLARE @ItemHistory TABLE (
ItemID INT,
Quantity INT,
DateSold DATETIME )
INSERT INTO @ItemHistory
SELECT 12, 18, '2007-01-10' UNION ALL
SELECT 12, 18, '2007-01-10' UNION ALL
SELECT 26, 12, '2007-01-10' UNION ALL
SELECT 28, 06, '2007-01-10' UNION ALL
SELECT 29, 06, '2007-01-10' UNION ALL
SELECT 30, 06, '2007-01-10' UNION ALL
SELECT 31, 06, '2007-01-10' UNION ALL
SELECT 31, 06, '2007-01-10' UNION ALL
SELECT 32, 12, '2007-01-10' UNION ALL
SELECT 33, 01, '2007-01-10' UNION ALL
SELECT 33, 06, '2007-01-10' UNION ALL
SELECT 36, 01, '2007-01-10' UNION ALL
SELECT 52, 12, '2007-01-10' UNION ALL
SELECT 83, 01, '2007-01-10' UNION ALL
SELECT 36, 12, '2007-01-10' UNION ALL
SELECT 37, 01, '2007-01-10' UNION ALL
SELECT 38, 12, '2007-01-10' UNION ALL
SELECT 17, 01, '2007-01-10' UNION ALL
SELECT 17, 08, '2007-01-10' UNION ALL
SELECT 12, 20, '2007-02-20' UNION ALL
SELECT 26, 10, '2007-02-20' UNION ALL
SELECT 30, 08, '2007-02-20' UNION ALL
SELECT 31, 12, '2007-02-20'
DECLARE @ItemStock TABLE (
ItemID INT,
Quantity INT )
INSERT INTO @ItemStock
SELECT 12, 20 UNION ALL
SELECT 12, 10 UNION ALL
SELECT 14, 48 UNION ALL
SELECT 17, 24 UNION ALL
SELECT 19, 36 UNION ALL
SELECT 19, 72 UNION ALL
SELECT 20, 72 UNION ALL
SELECT 26, 24 UNION ALL
SELECT 28, 12 UNION ALL
SELECT 29, 12 UNION ALL
SELECT 30, 12 UNION ALL
SELECT 31, 18 UNION ALL
SELECT 32, 20 UNION ALL
SELECT 32, 68 UNION ALL
SELECT 33, 10 UNION ALL
SELECT 35, 18 UNION ALL
SELECT 36, 46 UNION ALL
SELECT 36, 40 UNION ALL
SELECT 37, 30 UNION ALL
SELECT 38, 10 UNION ALL
SELECT 38, 33
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Aug 8, 2007
I have a table similar to the following:
ID ¦ Name ID ¦ Period From ¦ Period To ¦ Percentage ¦
---------------------------------------------------------------------------
Important - Each person can have more than one entry.
What I am trying to do is get the last percentage that each person obtained.
The only way I have been able to do this is by the following:
SELECT * FROM myTable
LEFT OUTER JOIN ( SELECT NameID, MAX(PeriodTo) as PeriodTo FROM myTable GROUP BY NameID) t1
ON myTable.NameID = t1.NameID
WHERE myTable.PeriodTo = t1.PeriodTo
I was wondering if there was another way of doing this, or whether this is an efficient method of doing this kind of query. Jagdip
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May 26, 2004
Hi all,
I need to build a query that aggregates the orders that have the same items,ex:.
ORDERS:
ID NUMBER
------------ ----------
1 123
2 456
3 789
ITEMS:
ORDERFK NAME
------------ --------
1 A
1 B
2 A
2 C
3 A
3 B
the result should be:
TOT_ORDERS:
NEW_ID QUANT
------------ ---------
1 2
2 1
NEW_ITEMS:
TOT_ORDERFK NAME
----------------- --------
1 A
1 B
2 A
2 C
Some ideia?
ThX
NeuralC
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Jun 22, 2005
I want to return a list that contains each employee's ID, the date of their last payrate adjustment, and their current payrate. Note that in the table below, employee 1002 was a bad boy in March of 2005, and his hourly rate was reduced to 14.00.
TableName: Employees
EmployeeID............Date.............PayRate
-------------------------------------------
....1001...............1/24/03............12.50
....1002...............2/28/03............12.75
....1003...............5/14/03............10.50
....1002...............3/15/04............15.00
....1001...............6/22/04............14.00
....1002...............3/16/05............14.00
The result set should look like:
EmployeeID...........Date.............PayRate
-----------------------------------------
...1003................5/14/03............10.50
...1001................6/22/04............14.00
...1002................3/16/05............14.00
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Jan 15, 2014
I am trying to use the following syntax and it is saying I can't use an aggregate function in a subquery. I can't use a GROUP BY in this case because if another field in the project table (such as status) is different, that project will show up twice.So in this case I am using this syntax to show the most recent quote within the project.
SELECT PROJECT.*, QUOTE.QuoteDate, QUOTE.QuoteCode
FROM PROJECT LEFT JOIN QUOTE ON PROJECT.ProjectID = QUOTE.ProjectID
WHERE QUOTE.QuoteDate=(SELECT Max(Q.QuoteDate) FROM QUOTE Q WHERE Q.ProjectID = PROJECT.ProjectID);
My goal here is to show the most recent quote within each project (there can be multiple revisions of a quote within each project). I want to show other fields such as the status of the quote, but if the status is different between quotes, the GROUP BY on that field will cause it to be listed more than once. All I want to show is the most recent quote for each project.
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Jul 23, 2005
I'm working on a fairly complex query, and to avoid exploding my brainany further, I'm going to keep this simple with an example of what I'mtrying to do...Let's say you had a table of customers and a table of ordersAnd you had data that looked like this:CustomersCustID CustName-------------------------------1 Billy2 JohnOrdersCustID Amount PaidYN-------------------------------1 $2 12 $3 01 $4 11 $2 02 $5 0And you wanted a report that looked like this:Customer TotalPaid TotalUnpaid------------------------------------------Billy $6 $2John $0 $8How would you write a query to generate this report?
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Oct 19, 2007
Can any1 tell me why i am getting an error
SELECT DISTINCT
--p.voucher,
--p.amount,
p.siteID,
b.siteID,
SUM((round(b.total,2,2)) - SUM(round(p.amount,2,2))) AS OutStandingBalance,
SUM((round(b.total,2,2)) - SUM(round(p.amount,2,2))) AS CashCheque,
SUM((round(b.total,2,2)) - SUM(round(p.amount,2,2))) AS Vouchers
FROM
BillingTotal b,
Payment p
--WHERE
-- s.sitename=@cmb1
--AND p.siteid = s.siteid
-- p.voucher = 0
-- p.voucher = 1
GROUP BY p.siteID,b.siteID
Msg 130, Level 15, State 1, Line 1
Cannot perform an aggregate function on an expression containing an aggregate or a subquery.
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Sep 22, 2015
I have 2 Dimensions in SSAS (see below end), I want to create a calculated member, named
This_Year_Billable_Objective_Count, with its formula = BillableLastYear*(100+ BillableObjective)/100.
The first factor, Â BillableLastYear is a number, aggregated (sum) from child units.
The second factor, Â BillableObjective is a percent number (for example 28 means 28%), it's not aggregate. It's an dependent value for each unit.
How can I calculate This_Year_Billable_Objective_Count for each unit?
\ able 1
SELECT [UnitKey]
   ,[UnitID]
   ,[UnitName]
   ,[Unit2Name]
   ,[Unit3Name]
   ,[Unit4Name]
[Code] .....
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Oct 17, 2006
I currently have the following query:
Quote:
select distinct a.memberFirstName, a.memberLastName, c.ChapterName, d.divisionName,
count(f.memberID) as numMembers
FROM Members a
INNER JOIN groupLeaders b
ON a.memberID = b.memberID
Inner JOIN Chapters c
ON c.chapterID = b.chapterID
LEFT JOIN divisions d
ON d.divisionID = c.divisionID
Inner Join groupsOfEight e
ON e.groupLeaderID = b.groupLeaderID
Inner Join groupOfEightMembers f
ON f.groupOfEightID = e.groupOfEightID
Group BY a.memberFirstName, a.memberLastName, c.chapterName, d.divisionName
Order By divisionName, numMembers
This query returns me the names of all of my Group Leaders, their Chapter, Division, and the number of members they have selected to be in their group.
Now, instead of the number of members in each Group I would like to know the total number of Members in each division to appear in the count.
[NOTE: All chapters have a division, linked by a divisionID in the "Chapters" table -- I need to get a count of all the "ChapterMembers" [chaptermembers is a table also] that are in the Division.
Here is the query I started to build before I ran into serious trouble:
Quote:
select a.divisionName, count('c.memberID') as numMembers
From Divisions a
Inner Join Chapters b
On b.divisionID = a.divisionID
Inner Join chapterMembers c
ON c.chapterID = b.chapterID
Left Join Members d
ON d.memberID = c.memberID
LEFT Join groupLeaders e
On e.memberID = d.memberID
Group By a.divisionName
This particular query returns only the DivisonName and the number of Members in the division as expected. However, when I try to select the information for the GroupLeader (first & last name) I am forced to add memberFirstName to the Group By statement which changes my Count...
Have I done an okay job of explaining the problem?
The goal here is to select all of the GroupLeaders first & last name, their chapterName, divisionName, and the total number of members in the division.
Thanks for any advice!
Zoop
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Jun 1, 2008
I have a table as below:
COMPUTERNAME, COUNTER, REASON
WXP-13Failed
WXP-1113Failed
WXP-38Failed
WXP-910Failed
WXP-117Success
What I would like to do is create a percentage of Success vs. the Failed for the same Computername.
Problem is when I use Group by I cannot tell the COUNTER of the Success anymore. This is what I have been using:
SELECT COMPUTERNAME, SUM(COUNTER) AS COUNTERTOTAL
FROM
ReturnTable
GROUP BY COMPUTERNAME
Thank you. The above query actually targets a result table from another query, but that should not matter.
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Mar 14, 2001
Ok so I need to write a query that finds the lowest grade out of a group of students (by a class number), and identifies it by a student id #.
Here's what I'm trying:
select min(gr.grade), gr.stu_id
from dbo.class cl, dbo.grade gr
where (cl.class = 2) and (abs(cl.stu_id) = abs(gr.stu_id))
group by gr.stu_id
but unfortunetly it returns the lowest grade for each student in class 2, and not the single lowest grade in class 2 and the stu_id (student ID).
I'm new to SQL and could really use the help.
Thanks
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Mar 13, 2012
I have a query where I have customers, date they ordered a swatch, date they ordered an item, and eh date diff between the two. I want to show the MIN date diff for each customer, and also show the swatch date and item date as well. But to use the MIN aggregate, it forces me to group everything, where I just want to group by customer, and have the 2 dates tag along, because i only want one record per customer. What is the easiest way for me to accomplish this?
SAMPLE:
CustKeySwatchDateRugDateDateDiff
10903963126678366
10903963126837525
10903963126960648
10913962286550322
1115886193625764
1129666456646711
1146986229625324
1146986229627647
11469862296667438
1146986656666711
1146986624666743
DESIRED RESULTS:
CustKeySwatchDateRugDateDateDiff
10903963126678366
1115886193625764
1129666456646711
1146986656666711
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Dec 1, 2014
I'm trying to write a query that returns last 30 days data and sums the amount by day. However I need to do it for every year not just the current one(I need to go back as far as 2000).
declare @t table (id int identity(1,1), dt datetime, amt MONEY)
insert into @t (dt, amt)
select '2014-11-30 23:39:35.717' as dt, 66 as amt UNION ALL
select '2014-11-30 23:29:16.747' as dt, 5 as amt UNION ALL
select '2014-11-22 23:25:33.780' as dt, 62 as amt UNION ALL
[Code] ....
--expected output
select '2014-11-30' AS dt, 71 AS Amt UNION ALL
select '2014-11-22' AS dt, 62 AS Amt UNION ALL
select '2014-11-20' AS dt, 66 AS Amt UNION ALL
select '2014-11-18' AS dt, 102 AS Amt UNION ALL
[Code] ....
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Aug 4, 2015
When i am running below snippet execution plan is showing constant scan instead of referring subquery table.
I want to know how this query working. and why in execution plan there is no scan /seek which will basically indicate that particular table is getting referred.
select count(*) from AÂ where exists (select count(1) from B where A.a=B.a)
execution plan has to show scan or seek for subquery. Surprisingly, output is coming as expected.
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Jan 13, 2008
To create a strike file for a text file output, I piped the output of a query throught a mulitcast. One output is the actual flat file, the other output is the strike file. The next task for the strike output is an aggregate count and sum functions. If the original query returns no records, the count shows zero, but the sum shows NULL. Further down the process I have to pad out the values with zero's, but that NULL is causing problems. How do I convert the Null to either an empty string, or a value of zero?
Thanks
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Aug 28, 2015
I have a a Group By query which is working fine aggregating records by city. Â Now I have a requirement to focus on one city and then group the other cities to 'Other'. Â Here is the query which works:
Select [City]= CASE WHEN [City] = 'St. Louis' THEN 'St. Louis' ELSE 'Other Missouri City' END, SUM([Cars]) AS 'Total Cars'Â
From [Output-MarketAnalysis]
Where [City] IN ('St. Louis','Kansas City','Columbia', 'Jefferson City','Joplin') AND [Status] = 'Active'
Group by [City]
Here is the result:
St. Louis 1000
Kansas City 800
Columbia 700
Jefferson City 650
Joplin 300
When I add this Case When statement to roll up the city information it changes the name of the city to 'Other Missouri City' however it does not aggregate all Cities with the value 'Other Missouri City':
Select [City]= CASE WHEN [City] = 'St. Louis' THEN 'St. Louis' ELSE 'Other Missouri City' END, SUM([Cars]) AS 'Total Cars'Â
From [Output-MarketAnalysis]
Where [City] IN ('St. Louis','Kansas City','Columbia', 'Jefferson City','Joplin') AND [Status] = 'Active'
Group by [City]
Here is the result:
St. Louis 1000
Other Missouri City 800
Other Missouri City 700
Other Missouri City 650
Other Missouri City 300
What I would like to see is a result like:
St. Louis 1000
Other Missouri City 2450
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Dec 25, 2006
While using Aggregate Transformation to group one column,the rows of output sometimes larger than the rows returned by a T-SQL statement via SSMS.
For example,the output of the Aggregate Transformation may be 960216 ,but the
'Select Count(Orderid) From ... Group By ***' T-SQL Statement returns 96018*.
I'm sure the Group By of the Aggregate Transformation is right!
But ,when I set the "keyscale" property of the transformation,the results match!
In my opinion,the "keyscale" property will jsut affects the performance of the transformaiton,but not the result of the transformation.
Thanks for your advice.
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Jul 15, 2005
I have a column that has an expression with a runningvalue in it, a "Carrying Cost" for each month. I need to create another column that aggregates the monthly Cost. I can't to do a Runningvalue on the Runingvalue. I can't even do a Sum on the Runningvalue.
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Jul 20, 2005
Hi,Suppose I have a table containing monthly sales figures from my shopbranches:Branch Month Sales-----------------------London Jan 5000London Feb 4500London Mar 5200Cardiff Jan 2900Cardiff Feb 4100Cardiff Mar 3500The question I am trying to ask is this: in which month did each branchachieve its highest sales? So I want a result set something like this:Branch Month----------------London MarCardiff FebI can do a "SELECT Branch, MAX(Sales) FROM MonthlySales GROUP BY Branch" totell me what the highest monthly sales figure was, but I just can't figureout how to write a query to tell me which month corresponded to MAX(Sales).Ideas anyone?Cheers,....Andy
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Mar 24, 2008
I have a table that has 4 colums (id,projectno,date,price)
i want to make a select that returns the sum per project no
i used this query
select projectno,sum(pice) as sum
from supplier
group by projectno
but i want to include additional columns like id and date for the result
but its giving this message:
Column 'supplier.id' is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause.
is there a better way to do so without joining the main table with the upper select query?
Best Regards
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Sep 25, 2007
I need to get the sum of a field that already has an aggregate function (MAX) performed on it. I am using the following query
Code Snippet
SELECT "tI"."ItemID", MAX("vSS"."ShortDesc") "Short Description",
MAX("tPCT"."FreezeQty") "Freeze Qty", SUM("vSS"."QtyOnHand") "Current Qty",
"tPCT"."BatchKey"
FROM ("vSS" "vSS"
INNER JOIN "tI" "tI"
ON "vSS"."ItemKey"="tI"."ItemKey")
LEFT OUTER JOIN "tPCT" "tPCT"
ON "vSS"."ItemKey"="tPCT"."ItemKey"
WHERE "vSS"."ItemID" = '3002954'
GROUP BY "tI"."ItemID", "tPCT"."BatchKey"
It yields the following results
ItemID
Short Description
Freeze Qty
Current Qty
BatchKey
3002954
SET, WRENCH HEX METRIC
-33
129
42221
3002954
SET, WRENCH HEX METRIC
51
129
42244
3002954
SET, WRENCH HEX METRIC
-31
129
42250
I need to SUM the maximum freeze quantity values per item ID. Therefore for this record, I need the following results:
3002954 SET, WRENCH HEX METRIC -13 129
Can this be done via a subquery? Any assistnance would be greatly appreciated?
Thanks,
DLee
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Feb 21, 2008
Does anyone know how to make a query and use an aggregate function? This is my current code...any help would be great.
"SELECT tblTopic.Topic_ID, tblTopic.Subject, MAX(tblThread.Message_date) AS MessageDate, tblThread.Message FROM (tblThread INNER JOIN tblTopic ON tblThread.Topic_ID = tblTopic.Topic_ID) WHERE (tblThread.Message_Date LIKE '%' + @fldGenus + '%' GROUP BY tblTopic.Topic_ID, tblTopic.Subject, tblThread.Message">
Also, How can i limit the query to only bringing up 5 records?
I'm trying to get a datagrid to show the 5 most recent forum posts for a particular category.
Thanks.
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May 14, 2008
I have a table that is used for employee evaluations. There are six questions that are scored either 1, 2, 3, 4, or 5. I want to tally the responses on a page, but I wonder if I can do it without 35 separate calls to the database (I also want to get the average response for each question). I know I can do "SELECT COUNT(intWorkQuality) AS Qual1 FROM dbo.Summer_Project_Req WHERE intWorkQuality = '1' " and then "SELECT COUNT(intWorkQuality) AS Qual2 FROM dbo.Summer_Project_Req WHERE intWorkQuality = '2' " and so on. But can I somehow do the aggregating at the page level, and just refer back to a datasource that uses a generic statement like "SELECT intWorkQuality, intDepend, intAnalyze, intWrite, intOral, intCompatibility FROM dbo.Summer_Project_Req"? If I can, I am not sure what type of control would be best to use or what syntax to use to write the code-behind. I would like the results to be displayed in a grid format. Thanks in advance for your help.
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Dec 4, 2003
I was doing a SUM on my returned rows and i found that what i really want is an aggregate bitwise OR on all the returned rows. Do you know what's the function for that?
Thank you
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Jul 24, 2001
What I'm trying to solve:
I have an application that generates SQL queries, and sometimes uses
DISTINCT where the result set has no dupe rows. In terms of database
resources, I'm trying to figure out if it's worth it to change to app to be
smart enough to not use DISTINCT where it won't serve any purpose, or
whether to let it do the DISTINCT and save added complexity to the query
building application. I.e. what is the cost of DISTINCT where there are no
dupe rows?
What I want to know:
Can someone explain how the stream aggregate operator actually goes about
doing its work?
Does this always create a temp table for sorting and discarding duplicates
(for DISTICNT)? If the answer is "no or sometimes", how does it do so in
the case where a temp table is not involved? I noticed the the estimated
I/O for this operator was zero for some queries I wrote agains pubs. Does
this mean that the optimizer believes the temp table needed will fit
in-memory and creates it in-memory? Or does the estimated I/O figure not
included disk writes for work tables?
tia for any info
Bill
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Jan 20, 2000
Hello,
I was told that on Oracle there's something called an Aggregate Navigator which should be capable of changing the table you're addressing in a query to another table (with aggregate data) and in this way optimize performance in a data warehousing environment.
Is there anything similar in MS SQL Server?
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Jun 6, 2003
Hi all,
I have a table with the following fields:
carrier,calc_date,ind_id,rcf
I need to run a query to get the following result(by carrier and for each calc_date, calculate the percentage of all individuals who have rcf greater than 0.73):
carrier,calc_date,count of ind with rcf > 0.73, count of all individual, percentage of individuals with rcf's greater than 0.73.
does anyone have an idea of how to achieve that result?
Thanx
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Jun 26, 2002
MS Access provides FIRST and LAST aggregates to select the first and last values from a group.
These aggregates apparently do not exist in TSQL.
I am after a workaround for the lack of these aggregates.
Any advice would be appreciated.
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